The Talmudic harmonizers were experts in their craft, so successful that Jews missed the multi-source origin of the bible and left this great observation to German scholars. On harmonizing 2 Kings (7 Av) and Jeremiah (10th Av), the Rabbis suggested the fire started at the 7th and lasted until the 10th. The 9th is then believed to have been picked for the final day of the SECOND Temple. Of course, the Rabbis were not present in Jerusalem of the First Temple and didn't know more than what the bible says. But they also missed something important. The passage in Jeremiah is a COPY of 2Kings (History book), placed there by the editors to show how Jeremiah's prophecy was fulfilled. The aforementioned dates are simply for the arrival of Nebuzaradan in Jerusalem. It happened either on one day or the other. No harmonization can work.
Kerry: Iran deal will make Egypt and entire region safer (Reuters)
from the article: American Jews without Israel, Israel without U.S. Jews